[PATCH i-g-t v4 4/5] tests/pm_dc: Added test for DC5 during DPMS

[Anshuman Gupta <anshuman.gupta@intel.com>]

From: Jyoti Yadav <jyoti.r.yadav@intel.com>

Added new subtest for DC5 entry during DPMS on/off cycle.
During DPMS on/off cycle DC5 counter is incremented.

v2: Rename the subtest with meaningful name.
v3: Rebased.
v4: Addressed review comments.

Signed-off-by: Jyoti Yadav <jyoti.r.yadav@intel.com>
Signed-off-by: Anshuman Gupta <anshuman.gupta@intel.com>
---
 tests/pm_dc.c | 32 ++++++++++++++++++++++++++++++++
 1 file changed, 32 insertions(+)

diff --git a/tests/pm_dc.c b/tests/pm_dc.c
index ea612a7..05f1363 100644
--- a/tests/pm_dc.c
+++ b/tests/pm_dc.c
@@ -164,6 +164,29 @@ static void test_dc_state_psr(data_t *data, int dc_flag)
 	check_dc_counter(data->drm_fd, dc_flag, dc_counter_before_psr);
 }
 
+static void dpms_off_on(data_t *data)
+{
+	for (int i = 0; i < data->display.n_outputs; i++) {
+		kmstest_set_connector_dpms(data->drm_fd, data->display.outputs[i].config.connector,
+					   DRM_MODE_DPMS_OFF);
+	}
+	igt_assert(igt_wait_for_pm_status(IGT_RUNTIME_PM_STATUS_SUSPENDED));
+	for (int i = 0; i < data->display.n_outputs; i++) {
+		kmstest_set_connector_dpms(data->drm_fd, data->display.outputs[i].config.connector,
+				   DRM_MODE_DPMS_ON);
+	}
+	igt_assert(igt_wait_for_pm_status(IGT_RUNTIME_PM_STATUS_ACTIVE));
+}
+
+static void test_dc_state_dpms(data_t *data, int dc_flag)
+{
+	uint32_t dc_counter;
+
+	dc_counter = read_dc_counter(data->drm_fd, dc_flag);
+	dpms_off_on(data);
+	check_dc_counter(data->drm_fd, dc_flag, dc_counter);
+}
+
 int main(int argc, char *argv[])
 {
 	bool has_runtime_pm;
@@ -209,6 +232,15 @@ int main(int argc, char *argv[])
 		test_dc_state_psr(&data, CHECK_DC6);
 		cleanup(&data);
 	}
+
+	igt_subtest("dc5-dpms") {
+		/* Check DC5 counter is available for the platform.
+		 * Skip the test if counter is not available.
+		 */
+		read_dc_counter(data.drm_fd, CHECK_DC5);
+		test_dc_state_dpms(&data, CHECK_DC5);
+	}
+
 	igt_fixture {
 		close(data.debugfs_fd);
 		display_fini(&data);
-- 
2.7.4

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